What threw me off was the “The system cannot find the file
specified”. Well, here is the command
that I used:

New-SRPartnership `

-SourceComputerNameLON-SVR1 `

-SourceRGNameRG01 _`

-SourceVolumeNameM: `

-SourceLogVolumeNameN: `

-DestinationComputerNameLON-SVR4 `

-DestinationRGNameRG02 `

-DestinationVolumeNameM: `

-DestinationLogVolumeNameN: `

-Verbose

I did not specify any file. I logged into LON-SVR4 and tried
to look for the StorgeReplica
log. It was not present. When I executed Get-WindowsFeature –Name Storage-Replica,
it returned a state of InstallPending. Problem solved.

My code was executed from the other member of the
replica. It rebooted before it told the
other server to do so. My mistake. I still do not know what file it was referring
to, but the reboot needed to complete the installation fixed the problem.